I am not sure why you have mixed answers? Might be you made a search about "managed server" but around $100/month? It's not really a fully managed server. Check out their management plans
For fully managed server, many people saying about rackpsace, datapipe, fastservers, servint and liquidweb. You can make a search about them.
I personally recommend cyberwurx team. I dont use their managed server service, but colo there. The true 24/7 supporting service. You cant go wrong with them
Clustered CloudLinux Hosting | WordPress Hosting
| Advanced Antispam | Managed Xen VPS
in US West coast
datacenters with Asia-Pacific friendly networks
Free migration to our servers. Contact us now on Twitter @vietnap